<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>栅格</title>
    <link rel="stylesheet" href="../../css/bootstrap.css">
    <link rel="stylesheet" href="../../bootstrap-icons-1.13.1/bootstrap-icons.min.css">
</head>
<body>
    <!--由外部的container和内部的row组成，最多12列-->
    <div class="container">
        <div class="row">
            <div class="col-1 border">1</div>
            <div class="col-1 border">2</div>
            <div class="col-1 border">3</div>
            <div class="col-1 border">4</div>
            <div class="col-1 border">5</div>
            <div class="col-1 border">6</div>
            <div class="col-1 border">7</div>
            <div class="col-1 border">8</div>
            <div class="col-1 border">9</div>
            <div class="col-1 border">10</div>
            <div class="col-1 border">11</div>
            <div class="col-1 border">12</div>
        </div>
        <div class="row">
            <div class="col-4 bg-success order-1">1</div>
            <div class="col-4 bg-info order-3">2</div>
            <div class="col-4 bg-danger order-1">3</div>
        </div>
        <div class="row">
            <div class="col-4 bg-primary">1</div>
            <div class="col-6 bg-secondary offset-2">2</div>
        </div>
</body>
</html>